Heat-conserver and smoke-consumer.



W. E. FROST.

HEAT CONSERVER AND SMOK.E.CONSUMER.

APPLICATION FILED JULY15.1915.

Patented Feb. 15, 1916'.

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HEAT CONSERVER AND SMOKE CONSUMER! APPLICATION FILED 1ULY15, 1915- Patented Feb. 15,1916.

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WALTER E. FROST, 0F AUBURN, MAINE, ASSIGNOB- TO FRED O. WATSON, OF AUBURN, MAINE.

HEAT-CONSERVER AND SMOKE-CONSUMER.

To aZZ whom it may concern.

e it known that I, WALTER E. F ROST, a citizen of the United States, residing at Auburn, in the county of Androscoggin and State of Maine, have invented certain new and useful Improvements in Heat-Conservers and Smoke-Consumers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in smoke consumers for use in connection with boilers or other furnaces.

The object of the invention isto provide a simply constructed and efiicient device of this character designed for arrangement adjacent the smoke flue of a stove or furnace which retards the passage of the products of combustion and commingles therewith fresh heated air, whereby all the smoke is consumed before being discharged through the smoke flue.

With this and other objects in View the invention consists of certain novel features of construction, and the combination and arrangement of parts to be hereinafter described and claimed.

In the accompanying drawings: Figure 1 represents a side elevation of a furnace equipped with this improved attachment, parts being broken out to show the arrangement thereof in the combustion chamber; Fig. 2 is a transverse vertical section taken on the line 22 of Fig. 1. Fig. 3 is a horizontal section taken on the line 3-3 of Fig. 1; Fig. 4 is a detail vertical section taken on the line H of Fig. 1; Fig. 5 is a perspective view of the baffle plate and its support detached.

In the embodiment illustrated a boiler or furnace 1 is shown which may be of any suitable or desired construction having the usual combustion chamber 2 and smoke flue 3, here shown connected with the top of the furnace above the combustion chamber. Arranged within this combustion chamber 2 is an air heating and conducting pipe 5 here shown composed of two parallel members 6 and 7 arranged in the same horizontal plane within the combustion chamber 2 and having their inner ends connected by an upwardly extending inverted U-shaped pipe or intermediate portion 8. The pipe 6 is made Specification of Letters Patent.

Patented Feb. 15, 191G. 1915. Serial no. 40,010.

longer than the pipe 7 and the free end t ereof is extended laterally through one side wall of the furnace and secured at its outer end by nuts 21 and 21 arranged on opposite faces of the furnace wall (see Fig. 2).

A housing 1'? is shown arranged over the outer end of the pipe 6 and is hingedly mounted on the outer face of the furnace as shown at 20. As shown, this housing is substantially rectangular with the side walls 19 thereof inclined downwardly and outwardly and merging into flanges 17 which are adapted to fit flat against the wall of the furnace as is shown clearly in Fig. 2. A disk 18 is arranged on the outer face of this housing, being here shown bolted thereto, and said disk and the facing on which it is mounted are provided with registering apertures 18 and 18 which register with the outer end of the pipe 6.

The inclined side walls 19 of the housing space its front face and the disk carried thereby a sufiicient distance from the outer face of the furnace on which it is mounted to afford ample room within the housing for the positioning of the end of pipe 6 and a lock nut for securing it, and also forms an air chamber to receive the air admitted through apertures 18 and 18", and which supplies the pipe 6.

spring pressed closure for the openings 18 and 18 is here shown in the form of a plate 9 pivotally connected at one end to the outer face of the disk 18 on one side of the aperture therein and extended across the opening in said disk with which the aperture of the housing and pipe ends 6 register. The free end of this plate 9 is connected with one end of a coiled spring 10, the other end of which is secured to the side wall of the furnace and exerts its tension to normally hold said plate closed over the opening in the disk. A stop 9 projects laterally from the disk 18 in the path of the free end of the plate 9 for limiting the closing movement of said plate and thereby properly positioning it with relation to the aperture in the disk. An operating chain 11 is also connected with the free end of the plate 9 and may be operated in any suitable or desired manner, either automatically or otherwise for lifting said plate to uncover the opening which communicates with the pipe 6 and thereby permits the atmospheric air to pass into said pipe 6 for a purpose to be described.

The free end of the member 7 of the inlet pipe is extended upwardly and is designed to discharge the fresh air which is heated in its passage through the member 6 and member 7, adjacent the inverted U-shaped member 8 which has a baflle plate 12 arranged at the rear thereof, and on which the members 6 and. 7 of the inlet pipe are supported. This baffle plate 12 is of a size less than the cross sectional area of the combustion chamber to provide for the free passage around the edges thereof ofthe products of combustion, and said baffle plate is disposed centrally of said chamber, being here shown mounted on a base formed by laterally extending flanges 18 and 14 resting on the bottom wall of the combustion chamber. The side edges of this baffle plate 12 are recessed as shown at 15 to form seats for receiving and supporting the parallel members 6 and 7 of the inlet pipe adjacent the inverted U-shaped loop or upright cross connectionthereof. By so disposing this bafi'le plate it performs the double function of a support for the heated air conduit and as means for retarding the products of combustion in their passage to the smoke flue and against which the fresh heated air discharged from the pipe 7 is designed to impinge, and be thereby thoroughly commingled with the products of combustion at this point to provide for the consumption of the smoke before it leaves the combustion chamber through the smoke fine 3.

The members 6, 7 and 8 are connected with each other by suitable elbows 16, but obviously the pipe may be made in a single piece if desired or found practicable.

By constructing the air heating conduit in the form above described with an upstanding inverted U-shaped intermediate portion, the air passing therethrough is exposed to the heat in the combustion chamber for an extended length of time so that when it is discharged atthe free end of the pipe member 7, it is in a very hot condition, which Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents facilitates its consumption of the smoke contained in the products of combustion with which it commingles adjacent the baffle plate 12. p i

I claim as my invention 1. The combination with a furnace having a combustion chamber provided with a smoke flue, an opening in the side wall of said combustion chamber, a hinged housing mounted over said opening, an apertured plate mounted on the outer face of said housing, a spring pressed plate mounted to close the apertures in said plate and housing, an air conducting pipe mounted in said combustion chamber and having one end registering with the openings in said housing and plate, said pipe having a transversely arranged inverted U-shaped portion extending upw'rdly at right angles therefrom intermediately of its ends, the inner end of said pipe being extended upwardly and adapted to discharge adjacent said inverted U-shaped portion,and a baiile plate arranged at therear of said U-shaped portion and having means for engagement with said pipe for supporting it in operative position.

In a furnace the combination of a combustion chamber, a smoke pipe leading therefrom, a baffle plate arranged in said combustion chamber and comprising a supporting base, having a member rising therefrom, and provided in its opposite side ec ges with recesses, an air inlet pipe mounted in said combustion chamber and having one end thereof opening through one wall of said chamber and communicating with the outside atmosphere, the other end of said pipe being positioned to discharge adjacent said baffle plate, said air inlet pipe being mounted in the recesses of said baffle plate whereby said pipe is supported. 7

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

lVALTER E. FROST.

lVitnesses FRED O. WATSON, E. B. BEALS.

Washington, D. C, 

